Archive for the ‘Work File Only – Observer’s Challenge Reports’ category

IC 348 – Open Star Cluster Plus Nebula – Perseus – January 2021 Observer’s Challenge Report #144

January 2, 2021

Compiled by:

Roger Ivester, North Carolina 

&

Sue French, New York

January 2021

Report #144

IC 348 – Cluster plus Nebula in Perseus

Sharing Observations and Bringing Amateur Astronomers Together

This month’s target

During his term as the first director of Dearborn Observatory, Truman Henry Safford discovered IC 348 on December 1, 1866, with the observatory’s 18.5-inch refractor. Safford published his observation in a table of objects found at Dearborn in the years 1866–1868. The table uses the alphabet-soup notation common to the era, which decrypted means: very large, very gradually brighter in the middle, pretty bright. Additionally, a note below that section of the table describes the object as “A loose cluster with nebula.” The combo appeared in the First Index Catalogue.

IC 348 has the dubious honor of bearing two IC designations. Edward Emerson Barnard independently discovered the nebula in 1893, and it was placed in the Second Index Calalogue as IC 1985, without anyone tumbling to the fact that it was already in the previous IC catalog. Unlike Safford, Barnard didn’t note the existence of the cluster within the nebula. 

IC 348 is thought to be roughly 1000 light-years away and a youthful 2–3 million years old. It holds about 500 stars, with brightest being hot, blue-white stars on the main sequence. The cluster’s visual magnitude is 7.3. By Sue French

january-2021-observers-challenge-_ic-348

Mario Motta: Observer from Massachusetts

This is 90 min, about 30 mins each Red/green/blue through the 32-inch scope, asi6200 camerainteresting in that I thought was mostly a reflection nebula, but the nebula is both red and some blue, so must be both reflection and some emission.

Roger Ivester: Observer from North Carolina

IC 348, open cluster in Perseus enveloped with nebulosity:  

Just to the south of bright star Omicron Persei (apparent visual magnitude 3.8) lies the sparse and scattered open cluster IC 348, which contains about 10 mostly dim stars.   


M76 – Planetary Nebula in Perseus – December 2020 Observer’s Challenge Report: #143

November 29, 2020

Compiled by:

Roger Ivester, North Carolina 

&

Sue French, New York

December 2020

Report #143

M76, Planetary Nebula in Perseus

Sharing Observations and Bringing Amateur Astronomers Together

 

 

 

 

 

NGC 278 – Galaxy in Cassiopeia – November 2020 Observers Challenge: #142

November 15, 2020

Compiled by:

Roger Ivester, North Carolina 

&

Sue French, New York

November 2020

Report #142

NGC 278, Galaxy in Cassiopeia

Complete report: Click on the following link

November 2020 OBSERVERS CHALLENGE _NGC 278

NGC 7332/7339 Galaxy Pair in Pegasus: October 2020 Observer’s Challenge Report #141

October 15, 2020

Compiled by:

Roger Ivester, North Carolina 

&

Sue French, New York

October 2020

To view the complete report: Click on the following link…

october-2020-observers-challenge-_ngc-7332-39

The Veil Nebula In Cygnus – September 2020 Observer’s Challenge Report #140

September 13, 2020

  

MONTHLY OBSERVER’S CHALLENGE

Compiled by:

Roger Ivester, North Carolina 

&

Sue French, New York

September 2020

Report #140 

The Veil Nebula has long been modeled as the remnant of a supernova explosion that occurred within an interstellar cavity created by the progenitor star. However, a recent study by Fesen, Weil, and Cisneros (2018MNRAS.481.1786F ) using multi-wavelength emission maps indicates that the large-scale structure of the Veil Nebula is due to interaction of the remnant with local interstellar clouds. Employing Gaia DR2 data, the team determined an distance of 735±25 pc. 

This beautiful nebula bears several NGC designations. Its western arc, NGC 6960, runs through the naked-eye star 52 Cygni and is commonly called the Witch’s Broom. The tantalizingly intricate western arc is called NGC 6992 in the north, while the tattered southern reaches comprise NGC 6995. The brightest part of Pickering’s Triangular Wisp, which claims no NGC number, lies between the northern tips of the two great arcs. The discoverers of NGC 6974 (Lord Rosse) and NGC 6979 (William Herschel) gave these pieces positions that don’t correspond to anything obvious, but the names have been popularly tagged onto the northern and southern parts of the nebulosity just east of Pickering’s Triangular Wisp. As good a guess as any.

September 2020 OBSERVERS CHALLENGE _Veil Nebula

Messier 20: Bright Nebula and Cluster in Sagittarius – August 2020 Observer’s Challenge #139

August 15, 2020

  

MONTHLY OBSERVER’S CHALLENGE

 Compiled by:

Roger Ivester, North Carolina

&

Sue French, New York

August 2020

Report #139

Sharing Observations and Bringing Amateur Astronomers Together

Messier 20, Nebula and Cluster in Sagittarius

Complete Observer’s Challenge Report:  

August 2020 OBSERVERS CHALLENGE _M20

Messier 8: Nebula and Cluster in Sagittarius – July 2020 Observer’s Challenge Report #138

June 11, 2020

     

MONTHLY OBSERVER’S CHALLENGE

Compiled by:

Roger Ivester, North Carolina

&

Sue French, New York

July 2020

Report #138

Messier 8, Nebula and Cluster in Sagittarius

Complete Observer’s Challenge Report 

July 2020 OBSERVERS CHALLENGE _M8 

NGC 5689 and Optional Galaxy NGC 5676 In Bootes – June 2020 Observer’s Challenge Report #137

May 20, 2020

MONTHLY OBSERVER’S CHALLENGE

Compiled by:

Roger Ivester, North Carolina

&

Sue French, New York

June 2020

Report #137

Galaxy NGC 5689 in Boötes

Complete Report 

June 2020 OBSERVERS CHALLENGE _NGC 5689

NGC 188 – A Very Faint and Difficult Open Cluster, and so Close to Polaris

April 30, 2020

AUGUST 2010 OBSERVERS CHALLENGE – NGC-188 

 

M85 and NGC 4394: Galaxies in Coma Berenices: Observer’s Challenge Report for May 2020: #136

April 22, 2020

MONTHLY OBSERVER’S CHALLENGE

Compiled by:

Roger Ivester, North Carolina

&

Sue French, New York

May 2020

Report #136 

M85 and NGC 4394:  Galaxies in Coma Berenices 

May 2020 OBSERVERS CHALLENGE _M85 and NGC 4394